Back-end Connections for an SC4020 with SC280
Expansion Enclosures
An SC4020 supports up to two SC280 expansion enclosures.
The following sections show common cabling between the SC4020 storage system and SC280
expansion enclosures. Locate the scenario that most closely matches the Storage Center you are
configuring and follow the instructions, modifying them as necessary.
SC4020 and One SC280 Expansion Enclosure
This figure shows an SC4020 storage system cabled to one SC280 expansion enclosure.
Figure 77. SC4020 and One SC280 Expansion Enclosure
1. Storage system 2. Storage controller 1
3. Storage controller 2 4. Expansion enclosure
The following table describes the back-end SAS connections from an SC4020 to one SC280 expansion
enclosure.
Table 11. SC4020 Connected to One SC280 Expansion Enclosure
Path Connections
Chain 1: A Side (Orange)
1. Storage controller 1: port A to the expansion enclosure: left EMM, port C.
2. Expansion enclosure left EMM, port B to storage controller 2: port B:
Chain 1: B Side (Blue)
1. Storage controller 2: port A to the expansion enclosure: right EMM, port
C.
2. Expansion enclosure: right EMM, port B to storage controller 1: port B.
Connect the Back-End Cabling
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